Liquid coating composition



i and hardens the kauri gum, and

Patented Sept "7, 1926.

' UNITED STATES PATENT OFFICE.

GUSTAVUS A. NEW, 01'' NEW YORK, N. Y., ASSIGNOR TO L. S..& N. CORPORATION, A COR- PORATION OF NEW YORK.

LIQUID COATING COMPOSITION.

No Drawing.

This invention is a liquid coating composition particularly adapted for coating metal, but which may be used for coating any object or material where the particular prop- 5 erties of the composition are desirable.

ing or peellng.

vThe coating or film is also thoroughly waterproof, a property of particular merit in preventing rusting of metalsyin addition it contains a material which is a positive preventative of rust.

The coating composition is particularly applicable to corset and collar steels, and is applied thereto by the process and apparatus as set forth in thepatent to Hoyt H. Leland and Gustavus A. New, No. 1,503,128, granted July 29, 1924.

I The body of the improved coatin composition contains kauri gum, pre erably India kauri gum, and China wood oil, the latter sometimes bei called tung oil. Any desired thinners and ryers, such as turpentine and Venolin may be used. Venolin is the trade name for a dryer on the market today and contains kerosene, naphtha and carbon tetrachloride.

The composition contains an oxidizing agent, preferably manganese dioxide, which serves two important functions; it oxidizes aids in formin arustproof coating over the metal.

Furt ermore the composition preferably contains a filler such as a suitable 1ron oxide. An oxide which is itself a rust preventative such as the ma etic oxide, may be used. Other fillers mayili added if desired. In case a very thin com ositionis desired, the filler could be omi A suitable coloring agent may also be Application filed April 15,1922. Serial No. 553,110.

added; for ablack: composition,lampblack may be used; for a white composition, zinc oxide may be used.

The preferred ratio of the ingredients for a coating composition for coating corset steels is as follows:

Parts. India kauri gum 20 China wood oil 40 Turpentine "L "a 15 Veno-lin' 1O Lampblack 1O Manganese dioxide 1 Iron oxide 4 The mixture is made up as follows: The China wood oil is boiled with constant stirring for two hours at 350 F. and. allowed to settle, the precipitated fatty acids and solid impurities being separated from the oil. The India kauri gum is heated separately until fluid, and added slowly to the oil. The lampblack is ground with the turpentine to proper fineness and then added with constant stirring to the mixture of gum and oil, while the mixture is still hot.

The whole mix is now heated again to 350 F. and boiled with constant stirring six hours, and then cooled'to about 110 F., after which Venolin, the man anese dioxide and the iron oxide are a ded with thorough stirring; the mix is then filtered and stored for at least threeweeks.

/is' slow drying and in practice the steel band which is bein coated, and from which the steels are ma e, is dried in an electric or cther suitable oven at about 450 F.as described in the above mentioned atent. The

time of drying may of course varied by varyin the uantity of dryer.

The invention is of course not limited to the exact proportions abo ve set forth; for

different uses, somewhat difierent proportions may be used. The approximate range is substantially as follows:

Parts. India. kauri gul'n 10 to China wood oil to 55 Turpentine 5 to 20 Ven0lin 5 11015 Lampblack 5 to 15 Manganese dioxide 1 to 2 Iron oxide 1 to 6 Itshould furthermore be understood that all'of the above ingredients need not be used,

and that recognized chemical equivalents of the several ingredients may be used. The broader aspects of the invention are as set forth in the appended claims. a

While India kauri gum is preferred for q the composition, it maybe possible to use other grades of kauri gum. The best results are had with the purer form of kauri gum known as India kauri gum. Although described as particularly applicable for coating metal, such as corset steels, the coating composition may be used in many instances where paint and varnish are used, articularly where a fireproof, rustproof an waterproof covering is desired.

I claim as my invention 1. A liquid GOiltlIlgQOIIlPOSltiOD, containing kauri gum, China wood oil, manganese dioxide, and iron oxide. 2. A liquid coating composition, containinglkauri gum, China wood oil, one to two parts of manganese dioxide and from one to six parts of iron oxide. I

3. A liquid coating composition containing the following ingredients in approximately the indicated proportions:'-'

- Parts. India .kauri gum 20 China wood oil 40 Manganese dioxide 1 Iron oxide N- 4. A liquid coating composition, containing India kauri gum, China wood oil, turpentine, Venolin, manganese dioxide and iron oxide.

5. A liquid coating composition, containing the following ingredients in approximately the indicated proportions 

